I see that there is a new "best-site" feature in Junos 12.2 for improving
the convergence time in VPLS multi-homed environments:
http://www.juniper.net/techpubs/en_US/junos12.2/topics/example/vpls-multihoming-convergence-example.html
The site-preference election method for determining the primary vs. backup
site uses BGP signalling so that the PEs can select the highest value to
indicate which site will actively handle traffic in order to prevent
loops, thus making the non-primary site passive. In our experience, if
you commit a PE configuration with a higher site value, VPLS converges
quicker than when you commit a PE configuration with a lower site value.
So perhaps the new "best-site" feature might help.
But operationally, it looks like the old site-preference and "best-site"
methods for determining the primary are pretty much the same. Am I
missing something? Does the "best-site" method really improve
convergence, and if so, how so?
Clarke Morledge
College of William and Mary
Information Technology - Network Engineering
Jones Hall (Room 18)
Williamsburg VA 23187
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